45th Pennsylvania Infantry

Regimental History and Service Record

Organized at Camp Curtin, Harrisburg, October 21, 1861. Moved to Washington, D.C., October 21-23. Attached to Jamison's Brigade, Heintzelman's Division, Army of the Potomac, to October, 1861. Unattached, Sherman's South Carolina Expeditionary Corps, to April, 1862. 2nd Brigade, 1st Division, Dept. of the South, to July, 1862. 2nd Brigade, 1st Division, 9th Army Corps, Army of the Potomac, to September, 1862. 3rd Brigade, 1st Division, 9th Army Corps, Army of the Potomac, to April, 1863, and Army of the Ohio to June, 1863. 1st Brigade, 1st Division, 9th Army Corps, Army of the Tennessee, to August, 1863, and Army of the Ohio to April, 1864. 1st Brigade, 2nd Division, 9th Army Corps, Army of the Potomac, to July, 1865.

SERVICE.--

• November 3-11, 1861 - Expedition into Lower Maryland

Moved to Baltimore, Md., thence to Fortress Monroe, Va., November 19-21. Sailed for Port Royal, S.C., December 6-8. Companies "A," "C," "D," "E" and "I" assigned to duty at Bay Point; Companies "B," "F," "G," "H" and "K" occupy Otter Island, S.C., December 11, and duty there until May, 1862; Companies "F" and "K" occupy Fenwick Island December 20, 1861; Company "F" at Fenwick Island April 4 to May 20, 1862; Companies "B," "F," "G," "H," "I" and "K" moved to North Edisto Island, S.C., May 21, 1862. Operations against James Island, S.C., May 21-June 28. Action on James Island June 10. Battle of Secessionville June 16. Evacuation of James Island and movement to Hilton Head June 28-July 1. Moved to Newport News, Va., July 18-21; thence to Aquia Creek August 4-5. Operations on the Rapidan and Rappahannock Rivers until September. At Brook's Station August 5-29.

• September 3-20, 1862 - The Maryland Campaign
  • Destruction of bridges at Potomac Creek and Brook's Station September 4
  • Destruction of stores at Aquia Creek September 6
  • September 14, 1862 - Battle of South Mountain, Maryland
  • September 17, 1862 - Battle of Antietam, Maryland

Duty at Pleasant Valley, Md., until October 26. March to Lovettsville, Va., October 26-29; thence to Warrenton October 29-November 19. Battle of Fredericksburg December 12-15. Burnside's 2nd Campaign January 20-24, 1863. At Falmouth until February 11. Moved to Newport News February 11, thence to Lexington, Ky., March 19-23. Duty at various points in Kentucky until June. Moved to Vicksburg, Miss., June 7-14.

• May 18-July 4, 1863 - Siege of Vicksburg, Mississippi

Advance on Jackson, Miss., July 5-10. Siege of Jackson July 10-17. At Milldale until August 5. Moved to Covington, Ky., thence to Crab Orchard August 5-18. Burnside's Campaign in East Tennessee August 16-October 17. Blue Springs October 10. Knoxville Campaign November 4-December 23. Lenoir Station November 14-15. Campbell's Station November 16. Siege of Knoxville November 17-December 4. Pursuit of Longstreet December 5-24. Regiment reenlisted January 1, 1864. Operations in East Tennessee until March, 1864. Strawberry Plains January 21-22. Movement to Annapolis, Md., March 21-April 6.

• May 4-June 12, 1864 - The Overland Campaign
  • May 5-7, 1864 - Battle of the Wilderness, Virginia
  • May 8-21, 1864 - Battles of Spotsylvania Court House, Virginia
    • May 12, 1864 - Assault on the Salient at Spotsylvania Court House, Virginia
  • Stannard's Mill May 21.
  • May 22-26, 1864 - Operations on Line of the North Anna River, Virginia
  • May 26-28, 1864 - Operations on Line of the Pamunkey River, Virginia
  • May 28-31, 1864 - Operations on Line of the Totopotomoy River, Virginia
  • June 1-12, 1864 - Battles of Cold Harbor, Virginia
    • June 1-3, 1864 - Battle of Bethesda Church, Virginia

Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865. Mine Explosion, Petersburg, July 30, 1864. Weldon Railroad August 18-21. Poplar Springs Church September 29-October 2. Peeble's Farm October 1. Boydton Plank Road, Hatcher's Run, October 27-28. At Fort Rice until April, 1865. Fort Stedman March 25, 1865. Assault on and fall of Petersburg April 2. March to Farmville April 3-9. Moved to Petersburg and City Point April 20-24, thence to Alexandria April 26-28. Grand Review May 23.

• Duty at Washington and Alexandria until July.
• Mustered out July 17, 1865.

Regimental Roster

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Regiment Statistical Information

Regiment Casualty Comparisons by Source

Source	Casualties	Remarks
Dyer	13 Officers and 214 enlisted men killed and mortally wounded 252 enlisted men killed by disease Total 479	None
Fox	13 Officers and 214 enlisted men killed and mortally wounded Total 227 (Combat Losses) Fox lists this unit as: 18th on the list of units "sustaining greatest loss in action" (Infantry units with over 200 casualties) 126th on the list of units with losses based on duration of the entire term of service of the unit (24th of the Pennsylvania troops)	This feature is not yet available. Check back soon for updates!
WotRWiki Statistics	0 troops killed Includes 0 troops mortally wounded Includes 0 troops killed by disease All others are troops killed in action or under special circumstances	This feature is not yet available. Check back soon for updates!

Legacy

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Sources

• Dyer, Frederick H. A Compendium of the War of the Rebellion. The Dyer Publishing Company (Des Moine, 1908). (Pages 759, 760, 761, 779, 932, 933, 934, 936, 938, 939, 940, 941, 1588)
• Fox, William F. 1840-1909. Regimental Losses in the American Civil War, 1861-1865: A Treatise on the Extent and Nature of the Mortuary Losses in the Union Regiments, With Full and Exhaustive Statistics Compiled From the Official Records on File in the State Military Bureaus and at Washington. Albany: Albany Pub. Co., 1889. (Pages 3, 13)